15 Questions
Which form of a virus lacks metabolism and the ability to reproduce independent of its host?
Virion
What is the protein shell that surrounds the genome of a virus particle called?
Capsid
Which of the following is NOT a characteristic of viral genomes?
Recombinant
According to the text, what is a virus?
A noncellular particle that infects a host cell and directs it to produce progeny particles
According to the text, what are bacteriophages?
Viruses that infect bacteria
According to the text, what is a provirus?
A virus that integrates its genome into that of the host
Which of the following is a characteristic of temperate viruses?
They can enter lysogeny and establish a long-term, stable relationship with the host
What is the function of CRISPR in bacterial defense against bacteriophage infection?
CRISPR integrates phage DNA sequences into the bacterial genome
What is a key difference between animal viruses and bacterial viruses?
Animal viruses bind specific receptor proteins on the host cell
Which of the following is true about the HIV life cycle in animal cells?
The viral capsid is delivered into the cytoplasm and the ssRNA genome is converted to dsDNA by the reverse transcriptase enzyme.
Which of the following defense mechanisms has evolved in animals and plants against viruses?
Both genetic resistance and RNA interference (RNAi)
What is the composition of an infectious viral particle (virion)?
A nucleic acid genome surrounded by a protein capsid and an envelope.
How are viruses classified in the Baltimore system?
Based on their means of mRNA synthesis.
What is true about the life cycles of retroviruses and pararetroviruses?
They have complex life cycles compared to other viruses.
How are plant viruses transmitted to other cells?
Mechanically
Test your knowledge on temperate viruses and their unique replication strategies. Explore the concepts of lytic and lysogenic cycles, as well as the long-term relationship established between viruses and their hosts. Discover how temperate viruses can influence the properties of host cells through lysogenic conversion.
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